also: ブレイド
Refers to the flat cutting part of a knife, sword, razor, or similar tool. Also used for blade-like parts in machinery, sports equipment, and as a metaphorical term.
The blade of this knife is very sharp.
I had the blades of my skates sharpened.
I replaced the blender's blade.
The fan's blades are spinning at high speed.
I had the skate blade sharpened.